Dell Dimension E521 - Manual (Page 51)

connector size 124 pins
connector data width (maximum) 32 bits
PCI Express
connector one x1
connector size 36 pins
connector data width (maximum) 1 PCI Express lane
PCI Express
connector one x16
connector size 164 pins
connector data width (maximum) 16 PCI Express lanes
Drives
Externally accessible:
Bays one 3.5-inch drive bay (FlexBay)
two 5.25-inch drive bays
Available devices Serial ATA drives (4), floppy drive, USB memory
devices, CD/DVD drive, and Media Card Reader
Internally accessible: two bays for 1-inch high serial ATA hard drives
Connectors
External connectors:
Video 15-hole connector
Network adapter RJ-45 connector
USB two front-panel and four back-panel USB 2.0-
compliant connectors
Audio six connectors for 7.1 support
System board connectors:
Serial ATA four 7-pin connectors
Internal USB device one 10-pin connector (supports two USB ports)
Floppy drive one 34-pin connector
Fan one 5-pin connectors
PCI 2.3 two 124-pin connectors
PCI Express x1 one 36-pin connector
PCI Express x16 one 164-pin connector
Front panel one 40-pin connector
Processor one 940-pin connector
Memory four 240-pin connectors
Power 12V one 4-pin connector
Power one 24-pin connector
Controls and Lights
Front of computer:
Power button push button
Power light green light — Blinking green in sleep state; solid
green for power-on state.
amber light — Blinking amber indicates a problem
with the power supply inside the computer. If the
system cannot boot and there is a solid amber light,
this indicates a problem with the system board (see
"Power Problems" in your Owner's Manual).
Diagnostic lights four lights on the front panel (see Diagnostic Lights .)
Standby power light AUX_PWR_LED on the system board
Hard-drive activity light green light — When the computer is reading data
from or writing data to the hard drive.
LAN indicator light green light — Solid green indicates that a LAN (local
area network) connection is established.
Rear of computer:
Link integrity light (on integrated network
adapter) green light — A good connection exists between a 10
Mbps network and the computer.